Place one foot on middle of exercise band with ends looped on shoulder width dip bars. Push band down partially by extending leg. Mount dip bar with arms straight and shoulders above hands. Place other foot on exercise band next to other foot. Keep hips straight.
Lower body until slight stretch is felt in shoulders. Push body up until arms are straight. Repeat.
Also see Band-assisted Chest Dips.
To decrease difficulty, use thicker band or perform other assisted version of this exercise.
To increase difficulty, use thinner band or place bent knees onto band. After some time, finally progress to Triceps Dips without assistance.